A semi-cylindrical force wall apparatus for mobile deformable barrier development

Abstract

The present application belongs to the technical field of automobile crash test device research and development and manufacturing, and particularly relates to a semi-cylindrical force wall device for developing a mobile deformable barrier, comprising a restraint mechanism, a force receiving mechanism and a plurality of crash columns, wherein the restraint mechanism comprises a rigid wall and a plurality of movable plates, the force receiving mechanism comprises a force receiving base plate and a force measuring unit, the rigid wall is provided with an assembly groove, the force receiving base plate is fixed with the rigid wall through the assembly groove, and the force measuring unit is fixed on the force receiving base plate in a matrix manner; the plurality of movable plates are fixedly connected with the rigid wall through an adjusting mechanism, and the two ends of the plurality of crash columns are fixed on the movable plates through a fixing mechanism, and the crash columns are in contact with the force measuring unit. The present application can solve the problem that the existing planar force wall cannot comprehensively show the mechanical characteristics of the mobile deformable barrier.

Description

Technical Field

[0001] This invention belongs to the field of automotive crash test device research and manufacturing technology, and particularly relates to a semi-cylindrical force measuring wall device for the development of mobile deformable barriers. Background Technology

[0002] Automobile collisions include frontal collisions, rear-end collisions, side collisions, angled impacts, and rollovers. Compared to frontal collisions, side collisions involve fewer energy-absorbing components on the sides of a car, with only 20-30mm of space between the occupant and the door panel. Once a car is involved in a side collision, the occupants experience a strong impact force, which, if exceeding the limits of human endurance, can be life-threatening. In side collisions, the severity of occupant injury is closely related to the amount of intrusion into the side of the vehicle; the greater the intrusion, the greater the injury. Therefore, research on side collisions is of great significance for reducing occupant injuries in these events.

[0003] Existing methods for studying side-impact collisions in automobiles mainly include real-vehicle crash tests and computer simulations. Moving deformable barriers, as an important testing device for side-impact collisions, represent the stiffness level of the colliding vehicle. The current 2020 version of C-IASI uses barriers from the US IIHS after 2003; however, these barriers are based on US mid-size SUVs or large pickup trucks and are no longer suitable for current US vehicle usage, let alone the practical needs of vehicles in my country. Vehicle usage in China differs from that in the US. According to statistics on the curb weight of 63 C-IASI-tested vehicles in my country from 2016 to 2019, the average curb weight of sedans was 1355 kg, SUVs averaged 1562 kg, and mid-size and larger SUVs averaged 1694 kg.

[0004] Therefore, in order to address the realities of vehicle collisions in my country and make collision tests more closely reflect the usage of vehicles in my country, it is necessary to develop and verify new mobile deformable barriers. Currently, the development and verification of mobile deformable barriers mainly involves collision tests with planar force-measuring walls. In tests with planar force-measuring walls, the deformation modes and mechanical responses exhibited by mobile deformable barriers are singular and cannot fully represent the mechanical characteristics of mobile deformable barriers. Therefore, in order to change this situation, a new type of force-measuring wall device is urgently needed. Summary of the Invention

[0005] The technical problem solved by this invention is to provide a semi-cylindrical force-measuring wall device for the development of mobile deformable barriers, so as to solve the problem that existing planar force-measuring walls cannot fully demonstrate the mechanical properties of mobile deformable barriers.

[0006] The basic solution provided by this invention is a semi-cylindrical force-measuring wall device for the development of mobile deformable barriers, including a constraint mechanism, a force-bearing mechanism, and multiple collision columns. The constraint mechanism includes a rigid wall and multiple movable plates. The force-bearing mechanism includes a force-bearing base plate and force-measuring units. The rigid wall is provided with an assembly groove. The force-bearing base plate is fixed to the rigid wall through the assembly groove. The force-measuring units are fixed on the force-bearing base plate in a matrix manner.

[0007] The multiple movable plates are fixedly connected to the rigid wall through an adjustment mechanism, and the two ends of the multiple collision columns are fixed to the movable plates through a fixing mechanism, and the collision columns are in contact with the force measuring unit.

[0008] Furthermore, the force measuring unit is a force sensor.

[0009] Furthermore, the force sensor is fixed to the load-bearing base plate in an 8-row, 16-column matrix, and the side length of the force sensor is 125mm*125mm.

[0010] Furthermore, the plurality of movable plates include a first movable plate and a second movable plate. The first movable plate is fixedly connected to the assembly groove of the rigid wall, and the second movable plate is connected to the first movable plate through an adjustment mechanism. The second movable plate and the force measuring plate are located on the same plane, and the two ends of the collision column are fixed on the second movable plate.

[0011] Furthermore, the adjustment mechanism includes multiple handwheels, a lead screw, a lead screw nut, and a fixed base. The fixed base is mounted on a first movable plate, and the lead screw nut is mounted on a second movable plate. The lead screw and the lead screw nut cooperate, with one end of the lead screw passing through the lead screw nut and fixedly connected to the fixed base, and the other end of the lead screw being fixedly connected to the handwheel.

[0012] Furthermore, the fixing mechanism includes a positioning bushing, a guide pin, a tightening nut, and a linear bearing. The positioning bushing is mounted on a first movable plate, the linear bearing is mounted on a second movable plate, the guide pin cooperates with the linear bearing and passes through the linear bearing to be fixedly connected to the positioning bushing at one end, and the other end of the guide pin is threadedly connected to the tightening nut.

[0013] Furthermore, the collision post is semi-circular, with a radius of 122mm, and the apex of the collision post is 240mm from the surface of the force measuring unit.

[0014] The principle and advantages of this invention are as follows: The semi-cylindrical force-measuring wall device involved in this application constrains the collision column through the cooperation between the movable plate, adjusting bolts, pipe clamps, guide shafts and guide tubes. At the same time, the force-measuring unit is in contact with the collision column, so that when the collision column is impacted by the movable deformable barrier, it can produce a mechanical response and deformation mode different from that of the movable deformable barrier on the planar force-measuring wall, thereby obtaining the mechanical characteristics of the local deformation of the movable deformable barrier, and solving the problem that the existing planar force-measuring wall cannot fully represent the mechanical characteristics of the movable deformable barrier.

[0015] Furthermore, this application provides multiple collision pillars, which can be disassembled and reassembled according to actual test requirements to change the number of collision pillars and thus complete different tests, thereby obtaining different test data of the mobile deformable barrier and obtaining more mechanical characteristics of the mobile deformable barrier. This can provide more data support for the development and verification of mobile deformable barriers and expand the scope of application. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the semi-cylindrical force-measuring wall device in Embodiment 1 of the present invention;

[0017] Figure 2 This is a top view of the semi-cylindrical force-measuring wall device in Embodiment 1 of the present invention;

[0018] Figure 3 This is a schematic diagram of the central pillar collision scenario in Embodiment 2 of the present invention;

[0019] Figure 4 This is a schematic diagram of the offset column collision scenario in Embodiment 3 of the present invention;

[0020] Figure 5 This is a schematic diagram of a double-column collision scenario in Embodiment 4 of the present invention;

[0021] Figure 6 This is a schematic diagram of a three-column collision scenario in an embodiment of the present invention. Detailed Implementation

[0022] The following detailed description illustrates the specific implementation method:

[0023] The markings in the accompanying drawings include: constraint mechanism 1, rigid wall 101, assembly slot 102, first movable plate 103, second movable plate 104, force-bearing mechanism 2, force-bearing base plate 201, force measuring unit 202, collision column 3, adjustment mechanism 4, handwheel 401, lead screw 402, lead screw nut 403, fixed seat 404, fixing mechanism 5, positioning bushing 501, guide pin 502, tightening nut 503, and linear bearing 504.

[0024] Example 1:

[0025] Example 1 is basically as follows Figure 1 and Figure 2 As shown: A semi-cylindrical force-measuring wall device for the development of a movable deformable barrier includes a constraint mechanism 1, a force-bearing mechanism 2, and multiple collision columns 3. The constraint mechanism 1 includes a rigid wall 101 and multiple movable plates. In this embodiment, the rigid wall 101 is provided with an assembly groove 102. There are two sets of movable plates, and the two sets of movable plates are respectively arranged above and below the force-bearing mechanism 2. Each set of movable plates includes a first movable plate 103 and a second movable plate 104. Specifically, the first movable plate 103 is connected to the assembly groove 102 on the rigid wall 101 by bolts, and the second movable plate 104 is connected to the first movable plate 103 by an adjustment mechanism 4.

[0026] In this embodiment, the adjustment mechanism 4 includes multiple handwheels 401, lead screws 402, lead screw nuts 403, and a fixed base 404. The fixed base 404 is mounted on the first movable plate 103, and the lead screw nut 403 is mounted on the second movable plate 104. The lead screw 402 cooperates with the lead screw nut 403, and one end of the lead screw 402 passes through the lead screw nut 403 and is fixedly connected to the fixed base 404. The other end of the lead screw 402 is fixedly connected to the handwheels 401. The adjustment mechanism 4 has 4 sets, so there are also 4 sets of handwheels 401, lead screws 402, lead screw nuts 403, and fixed bases 404.

[0027] The force-bearing mechanism 2 includes a force-bearing base plate 201 and a force-measuring unit 202. In this embodiment, the force-measuring unit 202 is a force sensor, specifically an FC series force sensor. The force-bearing base plate 201 is fixedly connected to the rigid wall 101 via an assembly slot 102, which can be achieved using adjusting bolts. The force-measuring units 202 are fixed to the force-bearing base plate 201 in a matrix arrangement. Specifically, the force-measuring units 202 are arranged in an 8x16 matrix and fixed to the force-bearing base plate 201 via bolts. Therefore, there are a total of 128 force-measuring units 202, each with a side length of 125mm*125mm.

[0028] When the collision post 3 is installed, its two ends are respectively installed on the second movable plate 104. During installation, it is connected by the fixing mechanism 5 and contacts the force measuring unit 202. Specifically, the fixing mechanism 5 includes a positioning bushing 501, a guide pin 502, a tightening nut 503 and a linear bearing 504. The positioning bushing 501 is installed on the first movable plate 103, the linear bearing 504 is installed on the second movable plate 104, the guide pin 502 cooperates with the linear bearing 504 and one end passes through the linear bearing 504 and is fixedly connected to the positioning bushing 501, and the other end of the guide pin 502 is threadedly connected to the tightening nut 503.

[0029] In this embodiment, the collision post 3 is semi-circular, and there are 5 collision posts 3. The radius of the collision post 3 is 122mm, and the distance from its vertex to the surface of the force measuring unit 202 is 240mm.

[0030] The specific implementation process is as follows: When installing the semi-cylindrical force-measuring wall device, the force-bearing base plate 201 is fixed on the assembly groove 102 of the rigid wall 101, and the force-measuring unit 202 is fixed on the surface of the force-bearing base plate 201 in an 8-row, 16-column arrangement. Simultaneously, two sets of movable plates are installed above and below the force-bearing base plate 201, respectively. Each set of movable plates is equipped with a first movable plate 103, a second movable plate 104, and an adjustment mechanism 4 for adjusting the distance between the first movable plate 103 and the second movable plate 104. Five collision columns 3 are respectively installed on the second movable plate 104 above and below the force-bearing base plate 201. When the collision post 3 is installed, the two ends of the collision post 3 are connected to the first movable plate 103 and the second movable plate 104 through the linear bearing 504, guide pin 502 and positioning bushing 501. Then, the distance between the first movable plate 103 and the second movable plate 104 is adjusted by the handwheel 401, lead screw 402, lead screw nut 403 and fixed seat 404 in the adjustment mechanism 4. During the adjustment process, the collision post 3 moves towards the force measuring unit 202 synchronously with the second movable plate 104. When the collision post 3 contacts the force measuring unit 202 and is in contact until it is in contact, the collision post 3 is fastened to the second movable plate 104 by tightening the nut 503.

[0031] After the semi-cylindrical device is installed, the position of the movable deformable barrier is adjusted so that its X-direction of travel is at 0° to the rigid wall 101. Then, an external traction device, such as a trolley device, is used to drive the movable deformable barrier to a speed of 20 km / h. The movable deformable barrier is then released so that it collides with the semi-cylindrical force measuring device of this application, and data is collected to complete the test.

[0032] Example 2:

[0033] like Figure 3 As shown, the difference between Embodiment 2 and Embodiment 1 is that in Embodiment 2, the collision post 3 is set to be one, and the collision post 3 is located at the center line of the force-bearing base plate 201 in the force-bearing mechanism 2.

[0034] The specific implementation process is as follows: The movable deformable barrier is driven by an external traction device to impact the collision post 3 located at the center line, data is collected, and the test is completed; the impact speed driven by the traction device is 25km / h.

[0035] Example 3:

[0036] like Figure 4As shown, the difference between Embodiment 3 and Embodiment 1 is that in Embodiment 3, the collision post 3 is set to one, and the collision post 3 is offset to one side of the centerline of the force-bearing base plate 201 in the early force-bearing mechanism 2.

[0037] The specific implementation process is as follows: The movable deformable barrier is driven by an external traction device to impact the collision column 3 located on one side of the offset centerline, and data is collected to complete the test; the impact speed driven by the traction device is 20km / h.

[0038] Example 4:

[0039] like Figure 5 As shown, the difference between Embodiment 4 and Embodiment 1 is that in Embodiment 4, two collision pillars 3 are set with the center line of the force-bearing base plate 201 in the force-bearing mechanism 2 as the symmetrical line.

[0040] The specific implementation process is as follows: the movable deformable barrier is driven by an external traction device to impact the two impact pillars 3 mentioned above, data is collected, and the test is completed; the impact speed driven by the traction device is 30km / h.

[0041] Example 5:

[0042] like Figure 6 As shown, the difference between Embodiment 5 and Embodiment 1 is that in Embodiment 5, three collision columns 3 are set along the centerline of the force-bearing base plate 201 in the force-bearing mechanism 2 and on both symmetrical sides.

[0043] The specific implementation process is as follows: The movable deformable barrier is driven by an external traction device to impact the three impact pillars 3 mentioned above, data is collected, and the test is completed; the impact speed driven by the traction device is 40km / h.

[0044] In this application, multiple collision pillars 3 are provided. The collision pillars 3 can be disassembled and assembled according to actual test requirements, and the number of collision pillars 3 can be changed to complete different tests, thereby obtaining different test data of the mobile deformable barrier, obtaining more mechanical characteristics of the mobile deformable barrier, providing more data support for the development and verification of the mobile deformable barrier, and expanding the scope of application.

[0045] The above are merely embodiments of the present invention. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, under the guidance of this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention. These should also be considered within the scope of protection of the present invention, and will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A semi-cylindrical force-measuring wall device for the development of mobile deformable barriers, characterized in that: The device includes a constraint mechanism, a force-bearing mechanism, and multiple collision pillars. The constraint mechanism includes a rigid wall and multiple movable plates. The force-bearing mechanism includes a force-bearing base plate and force-measuring units. The rigid wall has an assembly slot, and the force-bearing base plate is fixed to the rigid wall through the assembly slot. The force-measuring units are fixed to the force-bearing base plate in a matrix arrangement. The multiple movable plates are fixedly connected to the rigid wall through an adjustment mechanism. The two ends of the multiple collision pillars are fixed to the movable plates through a fixing mechanism, and the collision pillars are in contact with the force-measuring units. There are two sets of movable plates, which are respectively located above and below the force-bearing mechanism. Each set of movable plates includes a first movable plate and a second movable plate. The first movable plate is fixedly connected to the assembly slot of the rigid wall, and the second movable plate is connected to the first movable plate through an adjustment mechanism. The second movable plate is parallel to the plane where the force-measuring units are located. The two ends of the collision pillars are fixed to the second movable plate. The adjustment mechanism includes four sets of handwheels, lead screws, lead screw nuts, and fixed seats. In each set, the fixed seat is mounted on the first movable plate, the lead screw nut is mounted on the second movable plate, the lead screw and the lead screw nut cooperate, and one end of the lead screw passes through the lead screw nut and is fixedly connected to the fixed seat, while the other end of the lead screw is fixedly connected to the handwheel. The fixing mechanism includes a positioning bushing, a guide pin, a tightening nut, and a linear bearing. The positioning bushing is mounted on a first movable plate, and the linear bearing is mounted on a second movable plate. The guide pin cooperates with the linear bearing and passes through the linear bearing to be fixedly connected to the positioning bushing. The other end of the guide pin is threadedly connected to the tightening nut. During installation, the two ends of the collision column are connected to the first and second movable plates via linear bearings, guide pins, and positioning bushings. The distance between the first and second movable plates is adjusted by the handwheel, lead screw, lead screw nut, and fixed seat in the adjustment mechanism. During the adjustment process, the collision column moves towards the force measuring unit synchronously with the second movable plate. When the collision column contacts the force measuring unit and is in contact with it until they are in contact, the collision column is fastened to the second movable plate by tightening the nut. Multiple collision pillars are provided, and the number of collision pillars can be changed according to actual test requirements to complete different tests.

2. The semi-cylindrical force-measuring wall device for developing mobile deformable barriers according to claim 1, characterized in that: The force measuring unit is a force sensor.

3. A semi-cylindrical force-measuring wall device for developing a movable deformable barrier according to claim 2, characterized in that: The force sensors are fixed in an 8-row, 16-column matrix on the load-bearing base plate, and the side length of the force sensors is 125mm*125mm.

4. A semi-cylindrical force-measuring wall device for developing a movable deformable barrier according to claim 3, characterized in that: The collision column is semi-circular with a radius of 122mm, and the apex of the collision column is 240mm from the surface of the force measuring unit.

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